Synthesis of U3Se5and U3Te5type polymorphs of Ta3N5by combining high pressure–temperature pathways with a chemical precursor approach
Synthesis of U3Se5and U3Te5type polymorphs of Ta3N5by combining high pressure–temperature pathways with a chemical precursor approach
Combining metastable precursors with high pressure–temperature treatment is a powerful tool to make nitrogen-rich metal nitrides. Two new dense polymorphs of Ta3N5 have previously been theoretically predicted, with U3Se5 (Pnma) and U3Te5 (Pnma) structure types, and are now shown to exist. Amorphous Ta3N5 from thermal ammonolysis of an amorphous polymeric precursor was laser heated at 22 GPa and examined using synchrotron X-ray diffraction to reveal the emergence of these two novel polymorphs.
10041-10044
Salamat, Ashkan
5af74416-eb78-4ee4-844c-2499a79951a8
Woodhead, Katherine
5c441a5a-1eac-499a-a93b-d424212d98da
Shah, S. Imran U.
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Hector, Andrew Lee
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McMillan, Paul F.
8bca9219-06e0-4621-bdae-ad059709a147
11 July 2014
Salamat, Ashkan
5af74416-eb78-4ee4-844c-2499a79951a8
Woodhead, Katherine
5c441a5a-1eac-499a-a93b-d424212d98da
Shah, S. Imran U.
c6698fec-7cda-4b2f-b2c1-fcbcd404743e
Hector, Andrew Lee
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
McMillan, Paul F.
8bca9219-06e0-4621-bdae-ad059709a147
Salamat, Ashkan, Woodhead, Katherine, Shah, S. Imran U., Hector, Andrew Lee and McMillan, Paul F.
(2014)
Synthesis of U3Se5and U3Te5type polymorphs of Ta3N5by combining high pressure–temperature pathways with a chemical precursor approach.
Chemical Communications, 50 (70), .
(doi:10.1039/c4cc05147e).
Abstract
Combining metastable precursors with high pressure–temperature treatment is a powerful tool to make nitrogen-rich metal nitrides. Two new dense polymorphs of Ta3N5 have previously been theoretically predicted, with U3Se5 (Pnma) and U3Te5 (Pnma) structure types, and are now shown to exist. Amorphous Ta3N5 from thermal ammonolysis of an amorphous polymeric precursor was laser heated at 22 GPa and examined using synchrotron X-ray diffraction to reveal the emergence of these two novel polymorphs.
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Published date: 11 July 2014
Organisations:
Electrochemistry
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Local EPrints ID: 373033
URI: http://eprints.soton.ac.uk/id/eprint/373033
ISSN: 1359-7345
PURE UUID: ae2c26bd-94c1-431f-9d1a-0472bba30de3
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Date deposited: 06 Jan 2015 12:08
Last modified: 15 Mar 2024 02:52
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Contributors
Author:
Ashkan Salamat
Author:
Katherine Woodhead
Author:
S. Imran U. Shah
Author:
Paul F. McMillan
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